1.

5 moles of SO_(2) and 5 moles of O_(2) are allowed to react to form SO_(3) in a closed vessel. At the equilibrium stage 60% of SO_(2) is used up. The total number of moles of SO_(2), O_(2) and SO_(3) in the vessel now is

Answer»

10.5
3.9
`10.0`
8.5

Solution :`{(2SO_(2),+,O_(2),hArr,2SO_(3)),("Initially" rarr 5 "mole",,"5 mole",,"0 mole"),(" At eq" rarr 5(1-0.6),,5(1-0.3),,5 XX 0.6),("mole",,"Mole",,"Mole"):}`
When 60% `SO_(2)` is used up, the `O_(2)` used up = 30% & `SO_(3)` formed is 60% of initial AMOUNT of `SO_(2) rArr` TOTAL no. of mole `=2 + 3.5 + 3 = 8.5`


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